Peptides are tiny messengers that cells use to send signals by binding to...

https://star-wiki.win/index.php/What_Is_the_Difference_Between_Mechanism_and_Outcome_in_Biology%3F

Peptides are tiny messengers that cells use to send signals by binding to specific receptors. Scientists study these interactions to understand how signals trigger changes inside cells, like shifts in calcium levels or cyclic AMP production